Definition of mesochilium in US English:

mesochilium

noun

Botany
rare
  • = mesochile.

Origin

Mid 19th century; earliest use found in John Balfour (1808–1884), botanist. From meso- + ancient Greek χεῖλος lip + -ium.

Pronunciation

mesochilium

/mɛsə(ʊ)ˈkɪlɪəm/